Chapter test Flashcards
Circle the latter or each organisms that has been produced by selective breeding
A. Horses b. Dogs c. Cats d. Potatoes
Who was Luther Burbank
A selective plant breeder who developed disease resistant potatoes
What are the risks of inbreeding
There’s a chance that a cross between two individuals will bring together two recessive alleles for a genetic defect.
Why are biologists interested in preserving the diversity of plants and animals in the wild?
Selective breeding would al,last be impossible without the wide variation that is found in natural habitats
Breeders can increase the genetic variation by including _______, which are the ultimate source of genetic variability
Mutations
Name two methods used by breeders to increase the rate of mutations
Radiation and chemicals
Describe how animal cells can be transformed by directly injecting DNA
Once inside the nucleus, enzymes normally respond for DNA repair.
How do scientists know that plants and animals shore the same basic mechanisms of gene expression
A gene for Luciferase that is an animal enzyme, also works perfectly in a plant
What is a transgenic organism
An organism that contains genes form other species.
Describe how to make a transgenic organism
Using basic techniques of genetic engineering, a gene from one organism can be inserted into cells from another.
Genetic engineering has spurred the growth of ________, a new industry that is changing the way we interact with the living world.
Biotechnology
Circle the letter of each sent edge that is true about transgenic micro organisms
B. Transgenic bacteria produce human proteins cheaply and in great abundance
C. People with insulin-dependent diabetes are now treated with pure human insulin
D. In the future, transgenic organisms may produce the raw materials for plastic
List four ways in which transgenic animals have been used
Study genes
To improve the food supply
Study the effects of disease on the human immune system
To produce human proteins
Circle each item that might soon be produced by transgenic plants.
Human anti bodies
Rot- resistant food
Plastics
Vitamin A-enriched rice
T or F? For years, many scientists thought that it was impossible to clone bacteria
False
